热预处理乙丙胶对EPDM/MVQ共混胶交联密度及性能的影响
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摘要
研究了热预处理乙丙胶对EPDM/MVQ共混胶交联密度及性能的影响。由实验得知,随着热预处理乙丙胶母胶时间的变长,乙丙胶母胶的门尼黏度变大,溶胀度减小,共混胶硫化程度变大,工艺正硫化时间减小,EPDM交联密度变大,MVQ交联密度基本不变;老化后,EPDM交联密度继续变大,MVQ交联密度变大,且EPDM交联密度变大程度大于MVQ;扯断伸长率下降,100%定伸应力和硬度变大。
The effects of thermal pretreatment ethylene-propylene rubber on the crosslink density and properties of EPDM/MVQ blended rubber were studied. It is known from experiments that with the prolonged time of thermal pretreatment ethylene-propylene rubber masterbatch, the Mooney viscosity of ethylenepropylene rubber masterbatch becomes larger and the degree of swelling decreases; The vulcanization degree of the blended rubber becomes larger, and the process positive vulcanization time decreases; EPDM crosslink density becomes larger, and MVQ crosslink density is basically unchanged; After aging, EPDM crosslink density continues to increase, MVQ crosslink density also becomes larger, and EPDM crosslink density becomes greater than MVQ; The elongation at break reduces, and the 100% tensile strength and hardness increase.
The effects of thermal pretreatment ethylene-propylene rubber on the crosslink density and properties of EPDM/MVQ blended rubber were studied. It is known from experiments that with the prolonged time of thermal pretreatment ethylene-propylene rubber masterbatch, the Mooney viscosity of ethylenepropylene rubber masterbatch becomes larger and the degree of swelling decreases; The vulcanization degree of the blended rubber becomes larger, and the process positive vulcanization time decreases; EPDM crosslink density becomes larger, and MVQ crosslink density is basically unchanged; After aging, EPDM crosslink density continues to increase, MVQ crosslink density also becomes larger, and EPDM crosslink density becomes greater than MVQ; The elongation at break reduces, and the 100% tensile strength and hardness increase.
引文
[1]陆涛.像胶热氧老化机理及硅橡胶改性三元乙丙橡胶耐热氧老化性能研究[D].北京化工大学,2016.
[2] Kovalova S, Necas J. RT-3D TEE:characteristics of mitral annulus using mitral valve quantification(MVQ)program[J]. Echocardiography, 2011, 28(4):461.
[3]王诗凝,程超,高洪强,等.动态硫化POE/MVQ热塑性弹性体改性EPDM性能的研究[J].特种橡胶制品,2017(1):25-28.
[4]肖建斌,李建芳,邢祥菊,等.三元乙丙橡胶/乙烯-辛烯共聚物/甲基乙烯基硅像胶共混物的制备与性能[J].合成橡胶工业,2014, 37(1):20-24.
[5]李承家.三元乙丙橡胶/硅橡胶共混及性能研究[D].华南理工大学,2014.
[2] Kovalova S, Necas J. RT-3D TEE:characteristics of mitral annulus using mitral valve quantification(MVQ)program[J]. Echocardiography, 2011, 28(4):461.
[3]王诗凝,程超,高洪强,等.动态硫化POE/MVQ热塑性弹性体改性EPDM性能的研究[J].特种橡胶制品,2017(1):25-28.
[4]肖建斌,李建芳,邢祥菊,等.三元乙丙橡胶/乙烯-辛烯共聚物/甲基乙烯基硅像胶共混物的制备与性能[J].合成橡胶工业,2014, 37(1):20-24.
[5]李承家.三元乙丙橡胶/硅橡胶共混及性能研究[D].华南理工大学,2014.